Environmental and health implications of trace metal concentrations in street dusts around some electronic repair workshops in Owerri, Southeastern Nigeria

• Published in: Environmental monitoring and assessment Vol. 190; no. 12; pp. 696 - 12
• Main Authors: Ibe, Francis Chizoruo, Opara, Alexander Iheanyichukwu, Ibe, Bridget Onyekachi, Adindu, Blessing Chinonso, Ichu, Bright Chigozie
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.12.2018; Springer Nature B.V
• Subjects: Absorption spectroscopy; Adult; Adults; Analytical methods; Atmospheric particulates; Atmospheric Protection/Air Quality Control/Air Pollution; Atomic absorption analysis; Atomic absorption spectroscopy; Atomic beam spectroscopy; Cadmium; Cadmium - analysis; Child; Children; Chromium; Chromium - analysis; Copper; Copper - analysis; Dry season; Dust; Dust - analysis; Dust control; Dust storms; Earth and Environmental Science; Ecology; Ecotoxicology; Electronic Waste - analysis; Environment; Environmental impact; Environmental Management; Environmental monitoring; Environmental Monitoring - methods; Environmental science; Hazards; Health risks; Heavy metals; Humans; Lead; Lead - analysis; Markets; Metal concentrations; Metal scrap; Metals; Metals, Heavy - analysis; Monitoring/Environmental Analysis; Nickel; Nickel - analysis; Nigeria; Repair; Risk Assessment; Scrap; Sediments; Spectral analysis; Spectrophotometry, Atomic; Spectroscopy; Trace Elements - analysis; Trace metals; Waste disposal; Workshops; Zinc; Zinc - analysis; Nigeria; Street dust; Electronic waste; Hazard quotient; Risk assessment; Trace metals
• ISSN: 0167-6369; 1573-2959
• DOI: 10.1007/s10661-018-7023-6

Assessment of trace metal concentrations in street-deposited sediments around some selected electronic repair workshops in Owerri, Imo State, Nigeria, was carried out. The objective of the study was to determine the concentrations of trace metals, namely nickel (Ni), chromium (Cr), lead (Pb), copper (Cu), cadmium (Cd), and zinc (Zn), in surface dusts from streets within some electronic repair workshops in Owerri, Imo State, Nigeria. Dust samples were collected from seven locations within the month of January 2014 during the dry season when the onset of dust was high in the area. The samples were air-dried, sieved, and digested in aqua regia, with the concentrations of trace metals determined with atomic absorption spectroscopy, Agilant FS 240AA model (USA). Results of the study revealed all the trace metals assessed except Cr in dust sample from Aladinma (ALA). Though elevated concentrations of Zn and Cu were observed in all the sampled locations, the concentrations did not exceed the Dutch intervention values. Risk assessment of the heavy metals showed high average daily dose (ADD) of the heavy metals for children and adults at New Market 2 (NMK2), New Market 1 (NMK1), and Tetlow (TEL), which could be attributed to the presence of electronic repair workshops and activities of electronic scrap dealers within these areas. It was observed that the values of hazard quotient (HQ) were less than 1, while that of hazard index (HI) were all below 1–5, indicating that the heavy metals pose no health risk to adults and children in the environment. However, there may be potential danger if the waste generated from the electronic repair workshops and electronic scrap dealers are not properly disposed and managed.